bios: Remove two unneeded bios attributes as mentioned below
bios: Remove two unneeded bios attributes as mentioned below

1. pvm_inband_code_update
   - On BMC in-band CU is allowed based on pvm_hmc_managed and
     identified that redundant pvm_inband_code_update attribute
     is no longer needed.

2. pvm_surveillance
   - BMC controls whether surveillance runs via the setEventReceiver
     command, with the disable or enableAsync options. Hence, no
     need of pvm_surveillance attribute.

Signed-off-by: Sridevi Ramesh <cb5e1f81dd390dfc3a9afc08ab7298b7ab4296f5@in.ibm.com>
Change-Id: I053c1974b5fced2a024820efc576f0756bbabe65

openbmc/pldm,openbmc/pldm,openbmc/pldm